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(No Model.)

S. M. CHESTER. METHOD OF COATING PAPER AND OTHER MATERIAL WITH WAX. No.353,122. Patented Nov. 23, 1886.

N. PETERS. Hwwume n her. Washington, D4 c.

UNITED STATES PATENT OFFICE.

STEPHEN M. CHESTER; OF ELIZABETH, NEW JERSEY, ASSIGNOR TO CLAYTONBOGKHILL, OF NEYV YORK, N. Y.

METHOD OF COATING PAPER AND OTHER MATERIAL WITH WAX.

SPECIFICATION forming part. of Letters Patent No. 353,122, datedNovember 23, 1886.

Application filed May 1, 1886.

enable others skilled in the art to which it appertains to make and usethe same, reference being had to the accompanying drawings,and to theletters and figures of reference marked thereon, which form a part ofthis specification.

My invention relates to an iinproven'ient in the method of coating paperand other material with wax, and more particularly with parafline wax.

For many years paper coated or partially or entirely saturated withparafline has been employed in the construction of certain electricmachines and by confectioners and druggists. To prepare this paperproperly and in quantity, especially for the latter usesmentioned,elaborate and somewhat expensive machinery has been employed.The process has been substantially as follows: The paper, after havingbeen soaked in melted wax, has been passed between heated metallicrollers. When sufficiently cool, it has been carefully scraped to removeall excess of wax from the surfaces, when it has been again passedthrough calenderrollers to level,smooth, and polish the surfaces.

TVhile thin and porous paper, when soaked .in nearly boiling paraffine,will become saturated therewith, it is next to impossible, no matterwhat the heat, to cause pure paraffine to penetrate wood and many othermaterials to any desirable depth. Wood soaked in boil ing wax for hours,when allowed to cool, may be freed from Wax by simply scraping itssurface.

The object of my present invention is to provide a method by which thewax may be made to penetrate the paper and other material with moderateheat, and by which a smooth polished-like surface maybe attained withoutthe use of scrapers or calender-rollers.

Serial No. 200,841.

. through.

(No specimens.)

tile solvent.

The accompanying drawings represent one of several forms of machineswhich may be advantageously employed to prepare paper or other flexiblematerial, and which will suffice to illustrate my method.

Figure 1 is a vertical longitudinal section. Fig.2 is a crossscctionthrough line a: w of Fig. 1. Fig. 3 is a cross-section throughline y yofFig. 1, and Fig. 4. is a crosssection through line 2 z of Fig. l. l

A represents a tight box or trough having a groove, a, cut in its upperedge.

B is an air-tight cover, which drops down upon and into the groove a,cut in the upper edges of A, which is filled with water. This rendersthe box, when closed, absolutely airtight.

E is a tank of wood or metal placed at lefthand end of trough, providedwith halfjournals, into which axis of reel K may drop, and furtherprovided with rollers .T, the right-hand one of which runs in the tankor lower trough, and the left-hand one is fixed in the cover.

The interior of the entire box is divided into two chambers, G and D, bythe partition G, which has a slot or slit, g, cut in-it just largeenough to permit the slip of paper to pass The partition G is preferablycomposed of two pieces, one half being fixed in cover and the other inlower box, A. The slot 9 is better shown in Fig. 3.

F, at the right-hand end, represents another tank, in which are placedthe rollers J M J the use of which is obvious.

H represents a steam-pipe designed to warm chambers O and tank E. InFig. l the pipe H is represented as occupying the upper part of thechamber. It is in general, however, better to place it in the lowerpart, as shown in Fig. 2.

1 Figs. 1 and 3, is the terminal of a blast or blower pipe.

I is an escape-pipe, having orifices in each chamber, and it is supposedto terminate in a condcnsingworm. The roll of paper or other material isplaced upon the reel K and is drawn off through the machine by the reelL.

The tank E contains refined paraffine wax dissolved in naphtha or othervolatile solvent.

The tank F contains water, and the end of cover B is extended, as shownat O, to plunge into the water.

The roll of paper or other material having been placed in the tank E,the end is drawn over the right-hand roller J, over lower half of thepartition G, over left-hand roller J, underM, and over right-hand rollerJ to the reel L. The cover B being now placed in'position, the left-handroller J will press upon the paper, the slit in partition G will beformed, and because of the groove a and water-tank the wholeinterionwill be hermetically sealed. The rollers J may be of metal orwood covered with cloth or leather. Such heat only need be maintained inchamber 0.

as will keep the composition in tank E in a fluid or liquid state.Exhaust-steam, for example,is quite sufficient. The heat also evaporatesthe volatile solvent as it leaves the rollers J. The blast-pipe I?greatly assists in promoting rapid evaporation, and also drives thevapor off through the escape-worm I,where it.

' has been formed by the more complicated and expensive process hithertoemployed.

I am aware that it is not new to waterproof material by dipping it in asolution of wax and subsequently removing it fromthe solution and dryingit. I am also aware that it is old to submit material which has beentreated with wax to a cooling-blast, and that roofing fabric, afterhaving come hot from the making-machine, has been artificially cooled bypassing it through water.

Having thus fully described my invention, what I claim as new, anddesire to secure by Letters Patent, is

1. The method of coating paper or other material with wax, consisting,essentially, in first impregnating the paper or other material with wax;secondly, submitting the impregnated paper to an evaporating-blast, and,thirdly, passing it through water.

2; The method of coating paper or other material with wax, consisting infirst soaking the paper or other material in a solution of wax, thenexposing it to an evaporating-blast, and subsequently passing it throughwater.

3. The method of coating paper or other material with Wax, consisting infirst impregnating the paper with wax, then subjecting it heat to assistevaporation, and then passing it through water.

4. The method ofcoating paper and other material with wax, consisting,essentially, in first soaking the paper or other material in a solutionof wax, then exposing it to an evaporating-blast in an air-tightchamber, and finally passing it through a tank of water, substantiallyas set forth.

STEPHEN M. CHESTER.

Witnesses:

R. B. STEWART, G. R. WooDwoR'rH.

